Heath Kavanaugh lost years of his life working for a covert agency that ended up being the enemy. Knowing they put something inside his head — constant, incomprehensible whispers — is driving him crazy. He needs answers, but they’re nowhere to be found. What he definitely doesn't need is to fall hard for his Linear teammate's younger sister, Jacquelyn — the adorable linguistics doctoral student who happens to be in the wrong place at the wrong time.
Doctor Anne Griffin is back in Oak Creek, Wyoming, only because she has no other options. Here, she was always the shy, stuttering girl, invisible to everyone. Except Zac. The very reason she left in the first place. Zac's years in Special Forces taught him survival skills, and he's created a company - Linear Tactical - to teach those skills to others, so they never have to live in fear. Then why is Annie, the last person he'd ever want to hurt, afraid of him?
Adrenaline junkie. Adventure traveler. Extreme sport sensation. They’re all labels Riley Harrison - known to the world as Phoenix - wears as easily as the tattoos covering his body. But it’s his role as undercover operative for Linear Tactical’s kidnap and ransom unit that makes his blood sing. Riley uses his celebrity status to help infiltrate locations and situations nobody else can get into.
Single mom Peyton Ward works three jobs to make ends meet. At Linear Tactical, she’s surrounded by heroes on a regular basis, but none of them are hers. She thought she'd found one in Linear’s silent partner and country music superstar Cade Conner. She was wrong.
Ghost: Sometimes the dead don't stay that way. Dorian Lindstrom. Military codename: Ghost. He spent five weeks being tortured in an enemy prison because of her. And now he’s the only one who can save her. Shadow: How do you defeat an enemy that's inside your head? Heath Kavanaugh lost years of his life working for a covert agency that ended up being the enemy. Knowing they put something inside his head - constant, incomprehensible whispers - is driving him crazy. And Jacquelyn Zimmerman is the only one who can help.
Jordan Reiss is well aware that if she was on fire, the entire town of Oak Creek would probably go inside and make a sandwich. She can’t blame them. Her father scammed half the town out of their retirement funds, and then she...she did so much worse. She doesn’t expect forgiveness. But she’s back in town with no other options and just wants to be left alone to live on the fierce Wyoming land she’s missed so much during her six years in prison.
Shamrock: Aiden Teague. Military Codename: SHAMROCK, the lucky one. But all luck runs out eventually. Every mission has a price. He never meant for her to pay it. Angel: Even angels have their demons. Someone has decided it's time for Jordan to leave Oak Creek - preferably in a body bag. Former Navy SEAL Gabriel will have to put his distrust aside. Jordan needs her own guardian angel. And he happens to be one.
Zac Mackay. Military codename: Cyclone. He's the town's returned hero - a man forged in battle, now working to help others be safe. So why is Anne - the quiet doctor he’d never thought he’d see again - afraid of him?
And the only person who can save Charlotte Devereux. The woman who once shattered his life. When former Special Forces soldier Finn Bollinger is asked to help with an undercover mission, he's up for the task. His job teaching survival skills to civilians at Linear Tactical keeps him sharp, and he can still handle himself in the field. But the Army damn well didn't teach Finn how to handle Charlotte Devereux. She's back and she's all sorts of bad news.
Violet Collingwood thought the windowless room where her kidnappers have held her for the past three days was the worst possible place she could be. She'd been so very wrong. She's now arrived in hell. Aiden Teague left covert ops behind with the Special Forces, but he's doing one last mission as a favor to a friend. He's undercover with the worst kind of scum to help stop the sale of classified documents. But there's another kind of sale going on - and as soon as Aiden sees her terrified green eyes, he knows this mission just got a hell of a lot more complicated.
Dorian Lindstrom, codename Ghost, knows everyone breaks under torture. His five weeks in an enemy prison taught him that with unmerciful precision. He's put his life back together as best he can with the help from his brothers at Linear Tactical. But he's never gotten over his love for Grace Brandt, her part in his capture, or the fact that she died. But sometimes the dead don't stay that way. Grace knows her past can’t be forgiven. She's stayed hidden as long as she could, but now the secrets slowly suffocating her won’t stay buried any longer.